Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
USEFULNESS OF COLOR DOPPLER PROXIMAL ISOVELOCITY SURFACE-AREA METHOD IRM QUANTITATING VALVULAR REGURGITATION
Autore:
YAMACHIKA S; REID CL; SAVANI D; MECKEL C; PAYNTER J; KNOLL M; JAMISON B; GARDIN JM;
Indirizzi:
UNIV CALIF IRVINE,DEPT MED,DIV CARDIOL,BLDG 53,ROOM 100,101 CITY DR S,ROUTE 81 ORANGE CA 92668 UNIV CALIF IRVINE,DEPT MED,DIV CARDIOL ORANGE CA 92668
Titolo Testata:
Journal of the American Society of Echocardiography
fascicolo: 2, volume: 10, anno: 1997,
pagine: 159 - 168
SICI:
0894-7317(1997)10:2<159:UOCDPI>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLOW CONVERGENCE REGION; MITRAL REGURGITATION; ORIFICE AREA; AORTIC REGURGITATION; QUANTIFICATION; ACCELERATION; ECHOCARDIOGRAPHY; DIRECTION; SEVERITY; PITFALLS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
S. Yamachika et al., "USEFULNESS OF COLOR DOPPLER PROXIMAL ISOVELOCITY SURFACE-AREA METHOD IRM QUANTITATING VALVULAR REGURGITATION", Journal of the American Society of Echocardiography, 10(2), 1997, pp. 159-168

Abstract

To define the clinical utility of the color Doppler proximal isovelocity surface area (PISA) method for estimating regurgitant stroke volume (SV), 160 regurgitant lesions were evaluated in 104 patients with mitral (MR), aortic (AR), and tricuspid (TR) regurgitation. Regurgitant SV by PISA was calculated as 2 pi R-2 x V x (time-velocity integral/peak flow velocity), where R is the radius corresponding to the first blue-red interface velocity of the maximal PISA during the cardiac cycle. The time-velocity integral and peak flow velocity from the continuous-cave Doppler recording of the regurgitant jet were used to correct PISA for phasic variations in regurgitant flow. Fifteen lesions were excluded because of difficulty in tracing the continuous-wave Doppler regurgitant curve. Among 145 remaining regurgitant lesions, PISA was measurable in 50 (78%) of 64 cases of MR and 24 (69%) of 35 cases of TR but in only 12 (26%) of 46 cases of AR (p < 0.001). Regurgitant SV by PISA correlated modestly well with jet area/atrial area in all atrioventricular valve lesions (MR: r = 0.55; TR: r = 0.65; p < 0.001). However, the correlation improved if only central jets were considered (MR: r = 0.70; TR: r = 0.75; p < 0.001). These findings are not unexpected because jet area/atrial area underestimates the true severity of regurgitation in cases of eccentric (wall-impinging) jets. PISA was detected in all severe cases of regurgitation but in only 64% of cases of mild MR, 45% of cases of mild TR, and 6% of cases of mild AR (p < 0.01). The color Doppler PISA method is clinically useful in estimating regurgitant SV in MR and TR, including mild cases, but is less useful in AR.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 17:02:57